I know it can be very daunting at first, but as the time goes, so does learning. When you begin the clinical rotations, it's really begins to feel like all of the terms, terminology and any of the other items that are being thrown at you NOW, will begin to make sense. You will do just fine. Don't be afraid to ask the questions (I drove my instructor/clinical coordinator nuts!!!) if you aren't clear on something. I just took the practical exam for paramedic in Memphis, TN.
Don't sweat it. You will do just fine. Have faith in your skills and in the skills of your instructor. I had a blast in class!! I love what I do. Heck, I'm at work (Dixon Ambulance District, Dixon, MO) as I write this.